#!/usr/bin/env bash

# Prowler - the handy cloud security tool (copyright 2019) by Toni de la Fuente
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy
# of the License at http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software distributed
# under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
# CONDITIONS OF ANY KIND, either express or implied. See the License for the
# specific language governing permissions and limitations under the License.
CHECK_ID_extra7157="7.157"
CHECK_TITLE_extra7157="[extra7157] Check if API Gateway V2 has configured authorizers"
CHECK_SCORED_extra7157="NOT_SCORED"
CHECK_CIS_LEVEL_extra7157="EXTRA"
CHECK_SEVERITY_extra7157="Medium"
CHECK_ASFF_RESOURCE_TYPE_extra7157="AwsApiGatewayV2Api"
CHECK_ALTERNATE_check746="extra7157"
CHECK_SERVICENAME_extra7157="apigateway"
CHECK_RISK_extra7157='If no authorizer is enabled anyone can use the service.'
CHECK_REMEDIATION_extra7157='Implement JWT or Lambda Function to control access to your API.'
CHECK_DOC_extra7157='https://docs.aws.amazon.com/apigatewayv2/latest/api-reference/apis-apiid-authorizers.html'
CHECK_CAF_EPIC_extra7157='IAM'

extra7157(){
  for regx in $REGIONS; do
    LIST_OF_API_GW=$($AWSCLI apigatewayv2 get-apis $PROFILE_OPT --region $regx --query "Items[*].ApiId" --output text 2>&1)
    if [[ $(echo "$LIST_OF_API_GW" | grep -E 'AccessDenied|UnauthorizedOperation|AuthorizationError') ]]; then
        textInfo "$regx: Access Denied trying to get APIs" "$regx"
        continue
    fi
    if [[ $LIST_OF_API_GW ]];then
      for api in $LIST_OF_API_GW; do
        API_GW_NAME=$($AWSCLI apigatewayv2 get-apis $PROFILE_OPT --region $regx --query "Items[?ApiId==\`$api\`].Name" --output text)
        AUTHORIZER_CONFIGURED=$($AWSCLI apigatewayv2 --region $regx get-authorizers --api-id $api --query "Items[*].AuthorizerType" --output text)
        if [[ $AUTHORIZER_CONFIGURED ]]; then
           textPass "$regx: API Gateway V2 $API_GW_NAME ID $api has authorizer configured" "$regx" "$API_GW_NAME"
        else
           textFail "$regx: API Gateway V2 $API_GW_NAME ID $api has no authorizer configured" "$regx" "$API_GW_NAME"
        fi
      done
    else
      textInfo "$regx: No API Gateways found" "$regx"
    fi
  done
}